Extracting the Full Potential of Single‐Walled Carbon Nanotubes as Durable Supercapacitor Electrodes Operable at 4 V with High Power and Energy Density

Supercapacitor electrodes fabricated from single-walled carbon nanotubes (SWNTs) are shown to be capable of durable operation at 4 V, exceeding the operating voltage limit of activated carbon electrodes (AC, 3 V), while delivering significantly higher energy and power (see figure). Dual exploitation of SWNTs as combined electrodes and current collectors is also explored.